<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script type="text/javascript" src="../js/jquery.js"></script>
    <script type="text/javascript" src="../js/calculatorMountPlus.js"></script>
</head>
<body>
    <input type="text" id="app" placeholder="请输入"/>
</body>
</html>